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<html>

<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="../bootstrap-5.1.3-dist/css/bootstrap.css">
    <script src="../bootstrap-5.1.3-dist/js/bootstrap.js"></script>
</head>

<body class="container">
    <h3 align="center">平均分配剩下的空间</h3>
    <div class="d-flex bg-warning text-white">
        <div class="flex-fill p-2 bg-primary ">首页</div>
        <div class="flex-fill p-2 bg-success">经典的在线课程</div>
        <div class="flex-fill p-2 bg-danger">会员中心</div>
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</body>

</html>